PyQt – Load data from .txt file via Drag and Drop

[A Dav]

Hello everyone!

I have a folder TreeView on the left layout and I want to drag a .txt file from there and drop it to the other layout. Hopefully, I want to load the data of that dropped file on a variable.
For the code’s needs, I used till now (to my “real” code) the np.loadtxt() to load the data, so I’d like to use it here too.
In case it matters, the .txt file contains 4 columns (coordinates).

I post my code. The program closes when I drop the file.

Thanks in advance!


import sys, time, os

from PyQt5.QtWidgets import *
from PyQt5.QtGui import *
from PyQt5.QtCore import *

import numpy as np
import pylab as pl

import random

class Example(QMainWindow):

def __init__(self):
super().__init__()

self.initUI()


def initUI(self):

self.central_widget = QWidget()
self.setCentralWidget(self.central_widget)


self.folderLayout = QWidget();

self.pathRoot = QDir.rootPath()

self.dirmodel = QFileSystemModel(self)
self.dirmodel.setRootPath(QDir.currentPath())

self.indexRoot = self.dirmodel.index(self.dirmodel.rootPath())

self.folder_view = QTreeView();
self.folder_view.setDragEnabled(True)
self.folder_view.setModel(self.dirmodel)
self.folder_view.setRootIndex(self.indexRoot)

self.selectionModel = self.folder_view.selectionModel()

self.left_layout = QVBoxLayout()
self.left_layout.addWidget(self.folder_view)

self.folderLayout.setLayout(self.left_layout)

splitter_filebrowser = QSplitter(Qt.Horizontal)
splitter_filebrowser.addWidget(self.folderLayout)
splitter_filebrowser.addWidget(Figure_Canvas(self) )
splitter_filebrowser.setStretchFactor(1, 1)

hbox = QHBoxLayout(self)
hbox.addWidget(splitter_filebrowser)

self.centralWidget().setLayout(hbox)


self.setWindowTitle('Simple drag & drop')
self.setGeometry(750, 100, 600, 500)



class Figure_Canvas(QWidget):

def __init__(self, parent):
super().__init__(parent)

self.setAcceptDrops(True)

blabla = QLineEdit()

self.right_layout = QVBoxLayout()
self.right_layout.addWidget(blabla)


self.buttonLayout = QWidget()
self.buttonLayout.setLayout(self.right_layout)

def dragEnterEvent(self, e):

if e.mimeData().hasFormat('text/uri-list'):
e.accept()
else:
e.ignore()

def dropEvent(self, e):

print("something")
data = np.loadtxt(e.mimeData())
print(data)


if __name__ == '__main__':

app = QApplication(sys.argv)
ex = Example()
ex.show()
app.exec_()

[anda_skoa]

Can "np.loadtxt" handle a QMimeData object as its argument?

Cheers,
_

[A Dav]

Hi anda_skoa, thanks for your quick reply!
Truth is I have no idea, but I’m checking it out now in case I find something and I’ll post.
Have you any clue if it could be done in another way? For example to get the file name (e.g. this_file.txt) and then use something like:


with open("test_5.txt") as f:
data2 = np.loadtxt("this_file.txt ")

Thanks again!